diff --git a/configure/CONFIG_BASE_VERSION b/configure/CONFIG_BASE_VERSION
index f7141a82e..667b9f514 100644
--- a/configure/CONFIG_BASE_VERSION
+++ b/configure/CONFIG_BASE_VERSION
@@ -27,19 +27,19 @@ EPICS_VERSION = 3
 EPICS_REVISION = 15
 
 # EPICS_MODIFICATION must be a number >=0 and <256
-EPICS_MODIFICATION = 8
+EPICS_MODIFICATION = 9
 
 # EPICS_PATCH_LEVEL must be a number (win32 resource file requirement)
 # Not included if zero
-EPICS_PATCH_LEVEL = 1
+EPICS_PATCH_LEVEL = 0
 
 # This will end in -DEV between official releases
-EPICS_DEV_SNAPSHOT=-DEV
+#EPICS_DEV_SNAPSHOT=-DEV
 #EPICS_DEV_SNAPSHOT=-pre1
 #EPICS_DEV_SNAPSHOT=-pre1-DEV
 #EPICS_DEV_SNAPSHOT=-rc1
 #EPICS_DEV_SNAPSHOT=-rc1-DEV
-#EPICS_DEV_SNAPSHOT=
+EPICS_DEV_SNAPSHOT=
 
 # No changes should be needed below here
 
diff --git a/documentation/RELEASE_NOTES.md b/documentation/RELEASE_NOTES.md
index befae922b..fa180b685 100644
--- a/documentation/RELEASE_NOTES.md
+++ b/documentation/RELEASE_NOTES.md
@@ -1,10 +1,6 @@
 # EPICS Base Release 3.15.9
 
-This version of EPICS Base has not been released yet.
-
-## Changes made on the 3.15 branch since 3.15.8
-
-<!-- Insert new items immediately below here ... -->
+## Changes made between 3.15.8 and 3.15.9
 
 ### Use waitable timers on Microsoft Windows